Apparatus for turning heavy inner tubes, etc.



a w w m 1 P r 0 M H. C. PRIVETT.

APPARATUS FOR TURNING HEAVY INNER TUBES,

' man IAN-3.1921;

Jan. 16, 1923.

Patented Jan. 16, 1923.

' UNITEoA-SIATES PATENT OFFICE.

ENRY C. PRIVETT, or LONG BEACH, CALIFORNIA, nssreivon or CNEHALE To CHARLES R. PnIvET'r, 0E BUEBAEK, CALIFORNIA, THnEE-sIxTEENT s To HELEN E. PRIVETT AND ONE-SIXTEENTH, TO I-IOLLIS PRIVETT, BQTH OF LONG BEACH, CALIFORNIA.

APPARATUS FOR TURNING HEAVY INNER TUBES, ETC.

Application filed January 2,1921. Serial No. 434,687.

.1 0 all whom it mwy concern.

.Be it known that I, HENRY C. PRIVE'IT, a citizen of the United States, residing at Long Beach, in the county of Los Angeles and State of California, have invented new and useful Improvements .in Apparatus for Turning Heavy Inner Tubes, Etc, of which thefollowing is a specification. u y

This invention is an apparatus for turning tubes such as the inner tubes for automobile tires.

In the construction of such tubes a cylindrical tube is first formed upon a core or pole and this tube is then withdrawn from the pole by reversely turning it upon itself. The ends of the cylindrical tube are then joined together in order to form the finished tube construction.

In devices heretofore provided for turning the cylindrical tube, especially when turning tubes of relatively thick or heavy construction, it has been found that as the reversely turned end ofthe tube is moved along the unturned-portion of the tube remaining on the p0le,that the friction produced between the contacting surfaces of the tube renders it extremely difficult complish the turning of the tube.

My improved apparatus provides means for expanding the reversely turned end of the tube during the turning operationso as to acto hold said end out of contact with the unturned portion of the tube upon the pole and thereby eliminate friction and make it possible to readily turn the tube upon itself.

In. order to accomplish this expansion of the reversely turned end of the tube, I force air into the turn of the tube and thereby inflate: th reversely turned end. 'At the same time I provide a non-expandible casing for covering the turned end of the tube so to'limit the inflation thereof and thereby prevent excessive bulging of the turned end.

The invention will be readily understood from the following description of the accompanying drawings, in which:

Figure 1 is a longitudinal section through an apparatus constructed in accordance with the invention and showing the tube in position upon its pole before having its end secured to the sleeve for accomplishing turri- I ing of the tube. 1

F 1g. 2 is an enlarged longitudinal section through a portion of the apparatus show ing the tube end secured tothe reversing sleeve and also showing the tube partially turned upon itself. 7

1g. '3 is a transverse section on the line 3 3 of Fi 2. I

The tube 1 is formed in usual" manner upon the pole or core 2, said pole projecting beyond-the ends of the .tube a suitable distance. The ends of the tube are beveled in usual manner as shown at 3;;soth'at when the tube has been turned upon itself and removedfrom its pole, the beveled endsthereof may be readily united so as toform an annular tube. a

The endet ofthepole projecting beyond one end of the tube is held in a' suitable vice or, the like shown at 5, so as to support the pole'and tube during'the turning-operation.

It will be understood that this vice may be; r

or the like shown'at 6-. v

A sleeve 7 is received {over theo'pposite end ofthe pole and over tubelfsaid' sleeve mounted upon any suitablesupporting table being of such diameter ast'o readily receive tubes of various izes. This sleeve is closed atone end as shownat 8, and at its opposite end at 9.

of-the sleeve, being provided with a thread ed flange 11 connected tothe'threaded end which open -itis threaded as shown" A nipple 10 is received over the open end the nipple 12 is provided with an exterior annular bead 15. Y

The sleeve as thus described is received over the tube and pole and the end of the tube is reversed upon nipple 12, the annular head 15 tending to hold the tube end to the nipple. A casing 16 of non-expandiblemas terial is mounted upon the projecting end at of the tube pole, and one end of this casing is secured to the pole as shown at 17, while its opposite open end 18 is received over the end of the tube, which is reversed on nipple 12. The non-expandible casing is of sufiicient diameter to permit slight inflation of the reversely turned end of the tube, while preventing excessive inflation and bulging thereof. The non-expandible casing is also of sufficient length tov extend the length of the tube pole so that when the tube has been completely reversed upon itself and thereby withdrawn from the far end of the pole, the non expand'ible casing will still enclose the tube. The end of the casing is fixed to the end of the tube reversed upon nipple 13 by a suitableclamping ring shown at 20. The shell 7 is provided with a filler opening 21 preferably provided with a packing gland 22, and in operatingthe apparatus, a suitable nozzle 23 connected to an air line 24; is inserted through this packing gland so as to discharge air at a suitable pressure into shell '7. The'air will be forced through the space 13 between the tube and nipple l2 and thence into the annular space 25 between the tube and its reversely turned'end. The reversely turned end of the tube will be inflated as a consequence so as to position the same from the portion of the tube remaining upon the pole, and by this arrangement friction between the contacting surfaces of the tube and its reversely turned end is eliminated. By pulling rear-ward'ly upon sleeve 7, the tube-may now be reversed upon itself and readily withdrawn from pole 2.

It will thus be seen that I have provided extremely simple means cooperating with a tube turning apparatus for maintaining the turned portion of the tube out of frictional contact with the portion of the tube which has not yet been turned, and as a consequence a tube even when of relatively heavy construction may be readily turned by a slight pull upon the turning sleeve.

While I have illustrated the invention. as employed in connection with a straight pole or core, it will be obvious that it is readily adaptable to the type of tube forming mechanism which includes a curved'pole or corearranged for forming a tube substain daily in the annular form of the finished product. In connection with such mechanism, the sleeve receivedover the tube and pole would be curved to conform to the same. and since such a modified construction is Various changes may be made without departing from the spirit of the invention as claimed.

What is claimed is:

1. A tube turning apparatus including means for forcing air into the turn of said tube for expanding the turned portion thereof, and means for-limiting said expansion.

2. A. tube turning apparatus including means for forcing air into the turn of said tube for expanding the turned portion thereof, and a non-expandible casing received over said turned portion of the tube for limiting said expansion and for receiving said tube when turned.

, A turning apparatus for a tube upon .a pole, including a she-ll received over said tube and pole, a nipple on the end thereof having the end of said tube reversed thereon.

l. A turning apparatus for a tube upon a pole including a shell received over said tube and pole,; a nipple on the end thereof having the end of said tube reversed thereon. and means for forcing air between the tube and nipple into the turn of said tube. A turning apparatus for a tube upona pole, including a shell received over said tube and pole, a nipple on the end thereof having the end of said tube reversed thereon, and a filler opening in said shell adapted to receive an air nozzle for forcing air between the tube and nipple into the turn of said tube.

6. A turning apparatus for a tube upon a pole, including a shell received over said tube and pole, a nipple on the end thereof having the end of said tube reversed thereon, and a bag upon said pole having its end received over the reversed end of said tube.

7. A turning apparatus fora tube upon a pole, including a shell received over said tube and pole, and a nipple on the end thereof having the end of said tube reversed thereon, means for torch-1g air between the tube and nipple into the turn of said tube, and a non-expandible bag upon saidpole having its end received over the reversed end of said tube;

In testimony'whereof I have signed my name to this specification.

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